For those of you who do not already know about this project, Residual is:

"esidual is a cross-platform interpreter which allows you to play LucasArts' LUA-based 3D adventures: Grim Fandango and Escape from Monkey Island, provided you already have their data files. The clever part about this: Residual just replaces the executables shipped with the games, allowing you to play them on systems for which they were never designed!"